[Bug c++/82075] New: structured binding fails with empty base class

[barry.revzin at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82075

            Bug ID: 82075
           Summary: structured binding fails with empty base class
           Product: gcc
           Version: 7.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: barry.revzin at gmail dot com
  Target Milestone: ---

struct B { };
struct D : B { int i; };

int main() {
    auto [i] = D{};
}

On gcc 7.2, this fails with:

sb.cxx:5:10: error: cannot decompose class type ‘D’: both it and its base class
‘D’ have non-static data members
     auto [i] = D{};
          ^~~

But this is well-formed - all of D's non-static data members are public direct
members of D.